Why doesn’t the Philippines have ancient structures from the pre-colonial period

like Angkor Wat in Cambodia or Borobudur in Indonesia? Even Myanmar has Bagan. The closest example we have is Ijang Fortress, built by the Ivatan people, but still very far compare from the structures mentioned. Is it because we lacked religious influences like Hinduism and Buddhism, or were we are just lesser?

article about Ijang http://www.esquiremag.ph/long-reads/features/batanes-ivatan-pre-colonial-castles-a2765-20220422